According to Eramnews, Walid al-Ali, a professor at Kuwait University’s Faculty of Theology and Islamic Sciences, and Sheikh Fahd al-Husseini, a religious propagator, were at the restaurant during the incident.
The attack that began late on Sunday left at least 18 people dead and eight wounded in the capital of Burkina Faso, a West African country that has seen a surge in violence by armed groups over the past few years.
The figure was released early on Monday by Burkina Faso's communications minister Remi Dandjinou.
Canada's Foreign Minister Chrystia Freeland later said two Canadians were among the dead and French Foreign Affairs minister Jean-Yves Le Drian said a French citizen was killed.
Lebanon's interior ministry said three Lebanese died, including one who was also a Canadian national.
There was no immediate claim of responsibility for the violence, which continued into early Monday.
Earlier, authorities and witnesses suggested that three assailants had been killed by security forces, but Dandjinou revised the figure down to two, and said the security operation "has ended”.